* {
    margin: 0px;
    padding: 0px;
}
body {
    font-size: 14px;
}
ul {
    list-style: none;
}
#content {
    width: 1200px;
    margin: 100px auto;
}
#content_header {
    border-bottom: 3px solid #F60;
    height: 30px;
}
#content_header li {
    float: left;
    font-weight: bolder;
    height: 30px;
    width: 80px;
    text-align: center;
    line-height: 30px;
}
#content_header li:hover {
    cursor: pointer;
}
#content_header #sel {
    background-color: #FF6600;
    color: white;
}
#content_list li {
    font-size: 16px;
    height: 30px;
    line-height: 30px;
}

#tips {
    border: 2px solid #FF6600;
    position: absolute;
    width: 400px;
    padding: 5px;
    top: 0px;
    left: 0px;
    display: none;
    background-color: white;
}

#tips li {
    list-style: none;
}
#tips li.col {
    width: 180px;
    height: 30px;
    float: left;
    line-height: 30px;
    border-bottom: 1px solid #CCC;
}
#content_header .sec {
    background-color: #FF6600;
    color: white;
}